Dead fish on a beach in Quang Trach district in central Vietnam on April 20. Piles of dead molluscs have been found in the same coastal region where dead fish began washing up on beaches earlier this month, sparking alarm and hammering the local fishing economy. More than 100 tonnes of clams have died, state media reported yesterday, as public outrage mounts over a possible toxic leak into the sea near an industrial zone. Taiwanese conglomerate Formosa came under attack by Vietnam's normally staid state media over allegations that its multibillion-dollar steel mill may have leached industrial pollutants. But Formosa said there is no evidence that it was responsible for the mass fish deaths.